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Essential genes of a minimal bacterium.


ABSTRACT: Mycoplasma genitalium has the smallest genome of any organism that can be grown in pure culture. It has a minimal metabolism and little genomic redundancy. Consequently, its genome is expected to be a close approximation to the minimal set of genes needed to sustain bacterial life. Using global transposon mutagenesis, we isolated and characterized gene disruption mutants for 100 different nonessential protein-coding genes. None of the 43 RNA-coding genes were disrupted. Herein, we identify 382 of the 482 M. genitalium protein-coding genes as essential, plus five sets of disrupted genes that encode proteins with potentially redundant essential functions, such as phosphate transport. Genes encoding proteins of unknown function constitute 28% of the essential protein-coding genes set. Disruption of some genes accelerated M. genitalium growth.

SUBMITTER: Glass JI 

PROVIDER: S-EPMC1324956 | biostudies-literature | 2006 Jan

REPOSITORIES: biostudies-literature

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Essential genes of a minimal bacterium.

Glass John I JI   Assad-Garcia Nacyra N   Alperovich Nina N   Yooseph Shibu S   Lewis Matthew R MR   Maruf Mahir M   Hutchison Clyde A CA   Smith Hamilton O HO   Venter J Craig JC  

Proceedings of the National Academy of Sciences of the United States of America 20060103 2


Mycoplasma genitalium has the smallest genome of any organism that can be grown in pure culture. It has a minimal metabolism and little genomic redundancy. Consequently, its genome is expected to be a close approximation to the minimal set of genes needed to sustain bacterial life. Using global transposon mutagenesis, we isolated and characterized gene disruption mutants for 100 different nonessential protein-coding genes. None of the 43 RNA-coding genes were disrupted. Herein, we identify 382 o  ...[more]

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